Check page id instead

Author: brbrr

companion.php

@@ -26,8 +26,11 @@
 add_action( 'init', 'companion_add_jetpack_constants_option_page' );
 
 function companion_admin_notices() {
-	if ( function_exists( 'is_gutenberg_page' ) && is_gutenberg_page() ) {
-		return;
+	if ( function_exists( 'get_current_screen' ) ) {
+		$screen = get_current_screen();
+		if ( $screen->id === 'post' ) {
+			return;
+		}
 	}
 	$password_option_key = 'jurassic_ninja_admin_password';
 	$sysuser_option_key = 'jurassic_ninja_sysuser';